I tend to believe that it is quality and time spent on reflective moments rather than the absolute # of RCs that you do that makes the most difference. Remember that an RC comes about as a combination of already heightened awareness ("something's not right/odd/weird") together with memory ("I want to recognize the dream state and doing RCs is a way to help me to do that"). I recommend trying to hold heightened critical/self awareness for as long as possible throughout the day. If someone's doing "fire and forget" RCs that take a second or two, I think 5, 10, or 100 per day won't make much of a difference since that person is continuing to exist in a non-reflective auto-pilot state.

But if you're taking a solid minute or more to slow down, stop, consider your surroundings/thoughts/emotions with honest critical reflection, recall your last 10-15 minutes, remember your goal to notice the dream state and set solid intention to do similar reflection in your dreams in order to get lucid, and then do a solid RC or two with full attention, even 2-3 of these moments during the day is better than 10 or 100 "fire and forget" RCs. Of course, the more these proper reflective/awareness/memory moments you have, the better ,and the longer you can maintain this reflective mindset throughout the day the better. Enjoy the process and build it slowly over time so that it doesn't feel like a chore, so that you rejoice every time you remember to hold these moments. Because every single one of these moments is a moment of lucidity! You're doing nothing less than transforming yourself into a lucid person!